Answer:
7.08 m
Explanation:
(If we ignore the refraction of light)
There will form two triangles one at the top of pool (torch, edge of pool and point of incidence at top of pool) and one at the bottom of pool (torch, edge of pool and point of incidence at bottom of pool) .
first triangle at the top of pool (torch, edge of pool and point of incidence at top of pool)
First we need to find the angle of incidence:
Height = perpendicular = 1.3 m
Point of incidence = base= 2.5 m
now
tan∅= perpendicular / base
∅= tan⁻¹ (perpendicular / base)
∅=tan⁻¹ (1.3/2.5)
∅= 27.5°
Now 2nd triangle at the bottom of pool (torch, edge of pool and point of incidence at bottom of pool)
Height = perpendicular = 1.3 m + 2.1 m= 3.4 m (torch height + depth of pool)
∅= 27.5°
Spot of light hit bottom of pool= base=?
tan∅ = perpendicular / base
base = perpendicular / tan∅
base = 3.4/tan(27.5°)
base= 7.08 m
Spot of light hit bottom of pool= base= 7.08 m
Answer:
It gives our light which we need for probably everything.
Explanation:
At a constant force, the mass of the balloon is inversely proportional to the rate of change motion of the balloon.
The force applied to an object can be determined by applying Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.
F = ma
The mass of an object is inversely proportional to the rate of change motion of the object.
Thus, we can conclude that at constant force, the mass of the balloon is inversely proportional to the rate of change motion of the balloon.
Learn more here:brainly.com/question/19887955
Nicolaus Copernicus was considered the <span>"Father of Astronomy" because he believed the earth was the center of the solar system. The rest of the choices do not answer the question above.</span>
Answer: 116.926 km/h
Explanation:
To solve this we need to analise the relation between the car and the Raindrops. The cars moves on the horizontal plane with a constant velocity.
Car's Velocity (Vc) = 38 km/h
The rain is falling perpedincular to the horizontal on the Y-axis. We dont know the velocity.
However, the rain's traces on the side windows makes an angle of 72.0° degrees. ∅ = 72°
There is a relation between this angle and the two velocities. If the car was on rest, we will see that the angle is equal to 90° because the rain is falling perpendicular. In the other end, a static object next to a moving car shows a horizontal trace, so we can use a trigonometric relation on this case.
The following equation can be use to relate the angle and the two vectors.
Tangent (∅) = Opposite (o) / adjacent (a)
Where the Opposite will be the Rain's Vector that define its velocity and the adjacent will be the Car's Velocity Vector.
Tan(72°) = Rain's Velocity / Car's Velocity
We can searching for the Rain's Velocity
Tan(72°) * Vc = Rain's Velocity
Rain's Velocity = 116.926 km/h
